ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(46), P. 63628 - 63637
Published: Nov. 8, 2024
Electrolytes
play
a
crucial
role
in
enhancing
the
cycling
stability
and
overall
lifespan
of
lithium
metal
batteries
(LMBs).
However,
conventional
electrolytes
achieve
ununiform
low
ionic
conductivity
solid
electrolyte
interphase
(SEI),
leading
to
uncontrolled
dendrite
growth
dead
formation,
rendering
them
inadequate
for
meeting
performance
high
energy
density
LMBs.
Herein,
1,2-difluorobenzene
(1,2-dFBn)
is
introduced
as
antisolvent
fluorinated
which
composed
fluoroethylene
carbonate
(FEC)
bis(trifluoromethanesulfonyl)imide
(LiTFSI).
The
level
lowest
unoccupied
molecular
orbital
(LUMO)
fluorine-donating
ability
1,2-dFBn
jointly
modify
solvation
structure
electrode/electrolyte
chemistry.
As
result,
this
simple
formulation
enables
Li||Li
symmetric
cells
exhibit
remarkable
stability,
enduring
700
h
continuous
under
2
mA
cm–2
Li||Cu
cell
an
impressive
average
Coulombic
efficiency
(CE)
99.76%.
Moreover,
full
assembled
with
electrochemically
deposited
capacity
5
mAh
LiFePO4
(LFP)
cathode
achieves
exceptional
performance,
maintaining
discharge
specific
134.9
g–1
while
retaining
95.1%
at
2C
after
1000
cycles.
This
study
offers
plausible
ratio
design
electrolyte,
achieving
CE
long-life
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 29, 2024
Abstract
Lithium
(Li)
metal
batteries
have
attracted
great
attention
as
next‐generation
high‐energy‐density
storage
systems
due
to
the
high
theoretical
energy
density
and
low
redox
potential
of
Li
metal.
However,
safety
concerns
poor
cycle
life
are
hindering
commercialization
batteries.
Combination
current
collectors
regulate
plating/stripping
behaviors
is
an
effective
strategy
address
these
issues.
In
this
review,
recent
advances
in
for
composite
anodes
summarized,
including
construction
interfacial
protective
layers
on
collectors,
fabrication
utilization
3D
improving
surface
lithiophilicity
collectors.
Finally,
perspectives
limitations
future
research
directions
also
presented.
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 23, 2024
Abstract
Low
temperature
has
been
a
major
challenge
for
lithium‐ion
batteries
(LIBs)
to
maintain
satisfied
electrochemical
performance,
and
the
main
reason
is
deactivation
of
electrolyte
with
decreasing
temperature.
To
address
this
point,
in
present
work,
we
develop
low‐temperature
resistant
which
includes
ethyl
acetate
(EA)
fluoroethylene
carbonate
(FEC)
as
solvent
lithium
difluoro(oxalato)borate
(LiDFOB)
primary
salt.
Due
preferential
decomposition
LiDFOB
FEC,
solid
interface
rich
LiF
formed
on
metal
anodes
(LMAs)
cobalt
oxide
(LCO)
cathodes,
contributing
higher
stability
rapid
desolvation
Li
+
ions.
The
optimized
can
undergo
cycling
tests
at
−40
°C,
capacity
retention
83.9
%
after
200
cycles.
Furthermore,
exhibits
excellent
compatibility
both
LCO
cathodes
graphite
(Gr)
anodes,
enabling
Gr/LCO
battery
90.3
multiple
cycles
−25
°C.
This
work
proposes
cost‐effective
that
activate
potential
LIBs
practical
scenarios,
especially
environments.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(46), P. 63628 - 63637
Published: Nov. 8, 2024
Electrolytes
play
a
crucial
role
in
enhancing
the
cycling
stability
and
overall
lifespan
of
lithium
metal
batteries
(LMBs).
However,
conventional
electrolytes
achieve
ununiform
low
ionic
conductivity
solid
electrolyte
interphase
(SEI),
leading
to
uncontrolled
dendrite
growth
dead
formation,
rendering
them
inadequate
for
meeting
performance
high
energy
density
LMBs.
Herein,
1,2-difluorobenzene
(1,2-dFBn)
is
introduced
as
antisolvent
fluorinated
which
composed
fluoroethylene
carbonate
(FEC)
bis(trifluoromethanesulfonyl)imide
(LiTFSI).
The
level
lowest
unoccupied
molecular
orbital
(LUMO)
fluorine-donating
ability
1,2-dFBn
jointly
modify
solvation
structure
electrode/electrolyte
chemistry.
As
result,
this
simple
formulation
enables
Li||Li
symmetric
cells
exhibit
remarkable
stability,
enduring
700
h
continuous
under
2
mA
cm–2
Li||Cu
cell
an
impressive
average
Coulombic
efficiency
(CE)
99.76%.
Moreover,
full
assembled
with
electrochemically
deposited
capacity
5
mAh
LiFePO4
(LFP)
cathode
achieves
exceptional
performance,
maintaining
discharge
specific
134.9
g–1
while
retaining
95.1%
at
2C
after
1000
cycles.
This
study
offers
plausible
ratio
design
electrolyte,
achieving
CE
long-life
